replay/replay-time.c

   1 /*
   2  * replay-time.c
   3  *
   4  * Copyright (c) 2010-2015 Institute for System Programming
   5  *                         of the Russian Academy of Sciences.
   6  *
   7  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   8  * See the COPYING file in the top-level directory.
   9  *
  10  */
  11
  12 #include "qemu/osdep.h"
  13 #include "sysemu/replay.h"
  14 #include "replay-internal.h"
  15 #include "qemu/error-report.h"
  16
  17 int64_t replay_save_clock(ReplayClockKind kind, int64_t clock, int64_t raw_icount)
  18 {
  19     if (replay_file) {
  20         g_assert(replay_mutex_locked());
  21
  22         /* Due to the caller's locking requirements we get the icount from it
  23          * instead of using replay_save_instructions().
  24          */
  25         replay_advance_current_step(raw_icount);
  26         replay_put_event(EVENT_CLOCK + kind);
  27         replay_put_qword(clock);
  28     }
  29
  30     return clock;
  31 }
  32
  33 void replay_read_next_clock(ReplayClockKind kind)
  34 {
  35     unsigned int read_kind = replay_state.data_kind - EVENT_CLOCK;
  36
  37     assert(read_kind == kind);
  38
  39     int64_t clock = replay_get_qword();
  40
  41     replay_check_error();
  42     replay_finish_event();
  43
  44     replay_state.cached_clock[read_kind] = clock;
  45 }
  46
  47 /*! Reads next clock event from the input. */
  48 int64_t replay_read_clock(ReplayClockKind kind)
  49 {
  50     g_assert(replay_file && replay_mutex_locked());
  51
  52     replay_account_executed_instructions();
  53
  54     if (replay_file) {
  55         int64_t ret;
  56         if (replay_next_event_is(EVENT_CLOCK + kind)) {
  57             replay_read_next_clock(kind);
  58         }
  59         ret = replay_state.cached_clock[kind];
  60
  61         return ret;
  62     }
  63
  64     error_report("REPLAY INTERNAL ERROR %d", __LINE__);
  65     exit(1);
  66 }